Rotman,R.N. (1956)
Spore-pollen composition of the Brown Coals of the Chesterintzy deposits of the Knieper Basin of USSR [ Sporovo-Pilkovii Sklad Burogo Vugillya Shesterinets'Kogo Rodovichsha Knipovs'Kogo Baseini Ursr ] Dopovidi Akademii Nauk Ukrainskoi RRS,Seriya B. Geologichi Khimichi ta Biologichni Nauki
Vol. 1956 # 6 P. 577- 560